Hi Bill
Thanks for posting that, I always thought the Sonauto Yamahas were one of the most beautiful motorbikes ever made. Along with the Honda XL600 with the large tank and the Paris/Dakar BMW 80GS they are the stuff of dreams for me. There used to be a travelling marshal at Cadwell in the 80s who used a PD80GS and I always envied him as I plodded home on my A10 outfit with my children bouncing around inside.
Neither do I have the requisite testicular equipment, but I bet it felt great battering along on those 'steam hammers'.
Spartacus